Port-hole cutter.



PATBNTED JUNE 27, 1905,

J. J. NOLAN.

PORT HOLE CUTTER.

APPLICATION FILED JAN. 6, 1904.

4 SHEETSSHEET 1.

31 l ue ul'or lvihicwen No. 793,145. PATENTED JUNE 27,1905. J. J. NOLAN.

PORT HOLE CUTTER.

APPLICATION FILED JAN. 6, 1904.

4 SHEETS-SHEET Z.

umlllll ilHoz "up No. 793,145. PATENTED JUNE 27, 1905. J. J. NOLAN.

PORT HOLE CUTTER.

APPLICATION FILED JAN. 6, 1904.

4 SHEETS-SHEET 3 R V A 4 SHBETSSEBET 4.

PATENTED JUNE 27, 1905.

J. J. NOLAN.

PORT HOLE CUTTER.

APPLIOATION FILED JAN. 6, 1904.

H Cueaaco UNITED STATES Patented June 27, 1905.

PATENT OFFICE.

PORT-HOLE CUTTER.

SPECIFICATION forming part of Letters Patent No. 793,145, dated June 27, 1905.

Application filed January 6,1904- Serial No. 187,866.

To aZZ whom it may concern..-

Be it known that I, J OHN. J NOLAN, a citizen of the United States, residing in Brooklyn, in the county of Kings and State of New York, have invented a new and useful Improvement in Port-Hole Cutters, of which the following is a specification.

At the present time most shops of any pretension are equipped with air-compressors for operating the various forms of pneumatic appliances now in use, among which may be mentioned portable pneumatic rotary or recipro eating motors, which are adapted for drilling, reaming, tapping, and other purposes. It has heretofore been the general practice in shipyards in cutting port-holes, manholes, and the like in metal plates to mark on the plate a circle of the desired diameter and then to drill a series of small holes as near the circle as possible and thereafter to finish the port-hole or manhole by chipping. This is very laborious and expensive, and the work, furthermore, is not uniform.

In order to obviate the above diszulvantages and to take advantage of the general use of compressed-air rotary or reciprocating motors, I have devised a novel construction of apparatus which is light and portable in its character and which can be readily set up or anchored in position and to which a small portable pneumatic or other motor of the reciprocating or rotary type can be readily connected to or disengaged therefrom, provision being made for transforming the high speed of the motor to the requisite lower speed of the cutting or boring tool by the intervention of suitable gearing whereby speed is decreased and power increased.

The broad principle of my invention plicable not only to boring -or cutting portholes and manholes, but also to cutting holes of smaller diameter with or without a counterbore, also for threading pipe and similar or analogous operations wherein it is desired to rotate a boring or cutting tool of any character.

To the above ends my invention consists of the novel manner of providing for the coaction of a rotary or reciprocating compressedis apair motor with mechanism for operating boring or cutting tools of the general character hereinbefore referred to.

It also consists of novel means for reducing speed and increasing power and for effecting the feeding of the cutting apparatus.

It also consists of novel means for anchoring the boring or cutting apparatus in position.

It further consists of other novel features of construction, all as will be hereinafter fully set forth.

Figure 1 represents a perspective view of a port-hole cutter and its adjuncts embodying my invention. Fig. 2 represents a plan view of the same, on an enlarged scale. Fig. 3 represents an elevation, partly broken away. Figs. at and 5 represent, respectively, a top plan and an elevation of a detached portion of the cutter. Fig. (3 represents, on a reduced scale, a plate, showing a port-hole in the different stages of its production by my device. Fig. 7 represents an elevation, partly broken away, of another embodiment of my invention. Fig. 8 represents a top plan view of the same. Figs. 9, l0, and 11 represent perspective views of certain parts of the device shown in Figs. 7 and 8 detached. Fig. 1?. represents a section on line ,1: m, Fig. 10. Fig. 12) represents a portion of a plate, showing the operation of my device. Figs. 14. and 15 represent, respectively, side and end elevations of another embodiment of my invention.

Similar numerals of reference indicate corresponding parts in the lignres.

Referring to Figs. 1 to 6 of the drawings, .1 designates a pneumatic rotary or reciprocating motor of any approved construction, to which is connected a hose-pipe 2, through which the motive power is conveyed to the motor, which is applied to all the embodiments of my invention hereinafterdescribed and forms the prime motoror source of power by which they are operated. 3 designates the rotary chuck or tool holder or a bit therein, having the recess at adapted to engage a tongue 5 on the shaft 6 of my machine. The shaft 6 is supported in a suitable bearing 7 and carries a worm-wheel 8, meshing with a gear 9, which is splined upon the shaft 10 which is provided with a thread, and a handwheel 11, by which the shaft may be fed forward in the usual manner, as will be appar: ent to those skilled in the art. The shaft 10 is hollow and has passing through it a'bolt 12, by which the frame 13 is connected with an anchor 14, as shown in Fig. 3. Mounted on the tubular shaft 10 are arms 15 16, eX- tending laterally therefrom and provided with slots 17 18. In the slots are secured clamps 19, adapted to engage suitable cutting-tools 20 of the character desired.

The operation is as follows: One or more holes 21 are bored in the plate 22, which may be a ships plate or the like, from which cir cular pieces, as ports or manholes, are to be cut. The holes 21 are of a suitable size to permit the bolt 12 to be passed therethrough and has the anchor-plate 14 engaged there with by means of a nut 23. Suitable adjusting-screws 24 in the base of the frame 13 serve to properly secure the frame to the upper side of the plate, even if the same be curved or irregular or of other contour. The cutters 20 having been adjusted in the slots 17 and 18, according to the diameter of the circle desired to be cut, the rotary motor is connected with the shaft 6, as above described, and by the intermediate gearing the tubular shaft 10 and its adjuncts are rotated. The effect will be to mill a circle in the plate 22, as shown in Fig.3, which represents the cutters as raised from the plate after the work has been partially done.

In the embodiment of my invention shown in Figs. 7to 12 of the drawings I have shown the device as adapted to cut a hole 25, having an enlarged recess or countersunk portion 26 in the plate 27. The shaft 6, tongue 5, bearings 7, gears 8 and 9, tubular shaft 10, feedwheel 11, and bolt or bar 12 are mounted in a frame 13, as before, although the shape of the frame may be somewhat modified, as shown, without departing from the spirit of my invention. At the lower end of the shaft 10 is an internal thread 28, adapted to receive a holder 29, having a threaded portion 30. In the head 31 of the holder 29 are formed recesses 32, adapted to receive cutting-tools 33. A collar 34, provided with set-screws 35, is adapted to slip over the head 31 of the holder 29 and to hold the cutters 33 in place. The operation of this embodiment of my invention will be readily understood. It will be seen that the frame 13 is held in place, as before, by means of the bolt 12 and anchor 14, the bolt passing through a hole 21, previously drilled through the plate 27 and having the nut 23 thereon. The cutters 33 are provided with a shoulder at theirlower portion, so that they act to bore a circle 25, as above described, and at the same time to mill out a flanged or countersunk portion about such circle. The depth of the flanged portion may be determined by proper longitudinal adjustment of the collar 34 on the head 31 of the cutter-holder.

In Figs. 14 and 15 of the drawings I have shown the shaft 6 provided with a tongue 5, as heretofore described, mounted in a frame 35, in which are contained gear-wheels 8 and 9, as before described, the gear 9 rotating the shaft 10, which is connected with a tool-holder 36, in which is mounted a threading-die 37. 38 designates a piece of pipe held in a vise 39 in the usual manner. The threading-die 37 is splined on the shaft 10 and is forced forward toward its work by a lever or handle 40, pivoted at 41 and having a fork provided with fingers 42, engaging the groove 43, whereby the movement of the lever will move the toolholder 36 in the desired direction.

It will be seen that, as before, the pneumatic motor may be applied to the tongue 5 on the shaft 6 and the threading-die thereby rotated to thread the end of the pipe 38.

It will consequently appear from the foregoing that in each instance my invention broadly consists in the provision of suitable coacting mechanism whereby a compressedair or other motor can be readily connected to a portable apparatus capable of being readily anchored in place and wherein provison is made for reducing speed and increasing power and for feeding the cutting mechanism. While I have shown the broad principle of the in vention in Figs. 1 to 6 as applicable to a porthole cutter or a manhole-cutter and in Figs. 7 to 13 as applicable to cutting, smaller holes or simultaneously cutting and counterboring and in Figs. 14 and 15 as adaptable to threading pipe, it will be evident that other applications of my invention may be devised by those skilled in the art which will come within the spirit of the same.

It will be apparent that the frame or housing which contains the reducing-gearing may be differently constructed, the feeding mechanism may be modified, as may also the man ner of securing the cutting devices in position or the method of anchoring the frame in position, and therefore reserve to myself the right to all such or similar changes which come with in the scope of my invention.

It will be apparent that while I have re ferred'to the motor 1 as being a compressedair motor I do not desire to be limited thereto; but I have found the same in practice to be preferable to other forms of prime motors with which I am familiar.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. The combination of a frame, an axial bolt, an anchor carried by said bolt to engage one side of the plate to be cut, a fluid-operated motor mounted in said frame, a cutting mechanism, a tubular shaft surrounding said bolt and carrying the cutting mechanism, connections between said shaft and motor, and

means engaging the tubular shaft for feeding a frame, a cutting device carried thereby, a fluid-operated motor, means for imparting motion from said motor to said cutting devices, supports for said frame adapted to bear on the plate to be out beyond the cutting devices and an anchor suitably connected with said frame and arranged to bear upon the opposite side of the plate to be cut beyond the cutting devices.

JOHN JQNOLAN.

\Vitnesses:

VVM. CANER \VIEDERSEIM, E. H. FAIRBANKS. 

